[Opendnssec-develop] Creating keys

John Dickinson jad at jadickinson.co.uk
Mon Dec 1 14:50:48 CET 2008


On 30 Nov 2008, at 14:46, Olaf Kolkman wrote:

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> On Nov 28, 2008, at 5:47 PM, Stephen.Morris at nominet.org.uk wrote:
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>> Olaf Kolkman <olaf at NLnetLabs.nl> wrote on 27/11/2008 16:01:26:
>>
>>>
>>> On Nov 27, 2008, at 4:54 PM, John Dickinson wrote:
>>>
>>>>
>>>> So I guess if you have a large zone like co.uk then a couple of
>>>> seconds in the 6 odd minutes that it would take to sign from  
>>>> scratch
>>>> is nothing. However, if you have 1000's of small zones or you are
>>>> dynamically updating every minute then it could make a big  
>>>> difference.
>>>
>>> But even then... the key-rollover would take place only once per  
>>> month
>>> or so. So this 2 second pain per zone only happens once or twice per
>>> month.
>>
>> In this approach, are there any problems in ensuring that the keys  
>> are
>> replicated to a backup HSM before they are used?  Do you need any  
>> type of
>> "master" password to export private keys from the HSM?
>>
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>
> And again, here I can see a many zones using one private key. With  
> that possibility a number of these questions do not pop up. One  
> private key (with many public key instances) that is used for many  
> zones. One single generation, one single backup an al this magic.
>
> Not that one priv-key to many zones excludes many-to-many.

If you share keys do you need to coordinate key roll overs? For  
example, what about if you have 10 zones all sharing a key. Can you  
then add an 11th? It will have a different timeline for key rollovers.  
For starters the key publication and ready dates will be different,  
this means that the predicted key retire and dead times will be  
different. I guess you could sync them by retiring the key early in  
zone 11. Does rollover need to be done for all zones at the same time?

John





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